MAF = Mass Air Flow (sensor)
MAS = Mass Airflow Sensor
MAF = MAS? I've heard them used interchangeably. Autozone lists our MAF as an MAS. I'm just speculating... I'm supercharged, so all of my plumbing is different. But it would be helpful to identify what part you mean by part number or full description.

I don't think there is a separate intake air temp sensor - the MAF measures this value (since it measures airflow by it's temperature and how much current must be put through a heated wire to maintain temperature).

Anyway, surging idle often is associated with unmetered air getting into the intake, often through cracked intake gaskets. Try the carb cleaner test - this may identify the problem. If not, check for any poorly-fitting intake components that may be letting unmetered air in.

If you run an oiled air filter (like a K&N) you may have mucked up the MAF to the point that cleaning it won't help. CRC is the only company that makes an MAF cleaner - if you used a regular electrical contact cleaner, it may not have done anything (it made the MAF on my 928 worse!). I would suggest getting a NEW MAF (no rebuilds!) and see if your problems go away. The MAF could just be dying, too. It happens. It's an evil part - just because it's so critical to fuel injection. If it's off, so is your fuel-to-air ratio.

The acetone you have been experimenting with wouldn't affect the MAF.

Good luck!